Own phone number HTC desire cGeneral

I just bought the new HTC desire c. Two things that annoy me and where I might need some help. First, to use the app to check my phone credit, I need to specify my phone number in the settings. However, I cannot find where to do that. There does not seem to be a part like 'phone identity --> my phone number'. Secondly; the qwerty keyboard. In my previous phone, HTC Wildfire, you could change the settings from azerty to qwerty without any problem. Here it does not seem to work like that. Do you have any ideas how to change this?